You can pull and tie down quite a lot, but maybe you might get some of those bending training clips I've seen. I don't think they stress the plant much at all.
Now that main stem might just need some rolling between your fingers and bend her down.
Kinda hard with her not in front of me, but If I had her, I'd either pull down or clip train the lowers first and then see where it would be best to move the main.
I used some training clips for mt first DWC and found them very helpful. A ton of people make them, but I got mine from Mad Man Plant. Small
shop, 3d printed, various sizes, A+ for me.